Fence post cap



FIG. 1 is a perspective view from above of the fence post cap, which is the subject of the present design;

FIG. 2 is a perspective view from below;

FIG. 3 is a side elevational view; the opposite side elevational view being a mirror image thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top plan view thereof. 

The ornamental design for a fence post cap, as shown and described. 